Know Your Customer (KYC) refers to due diligence that banks and other financial institutions must perform on their customers before doing business with them. Know your customer policies are usually required by governments and enforced by bank regulators to prevent corruption, identity theft, financial fraud, money laundering and terrorism financing. Most Know Your Customer frameworks are based on four components: 1) customer identification, 2) customer acceptance, 3) transaction monitoring and 4) ongoing risk management. Requirements vary by country, but the collection of basic identity documents, comparison against certain name lists (‘politically exposed persons’ or PEP lists, for example), and analysis of transaction behaviors are most common.